1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_HARDWARE_INTERFACES_CAMERA_COMMON_1_0_EXIF_H 18 #define ANDROID_HARDWARE_INTERFACES_CAMERA_COMMON_1_0_EXIF_H 19 20 #include "CameraMetadata.h" 21 22 namespace android { 23 namespace hardware { 24 namespace camera { 25 namespace common { 26 namespace V1_0 { 27 namespace helper { 28 29 30 // This is based on the original ChromeOS ARC implementation of a V4L2 HAL 31 32 // ExifUtils can generate APP1 segment with tags which caller set. ExifUtils can 33 // also add a thumbnail in the APP1 segment if thumbnail size is specified. 34 // ExifUtils can be reused with different images by calling initialize(). 35 // 36 // Example of using this class : 37 // std::unique_ptr<ExifUtils> utils(ExifUtils::Create()); 38 // utils->initialize(); 39 // ... 40 // // Call ExifUtils functions to set Exif tags. 41 // ... 42 // utils->GenerateApp1(thumbnail_buffer, thumbnail_size); 43 // unsigned int app1Length = utils->GetApp1Length(); 44 // uint8_t* app1Buffer = new uint8_t[app1Length]; 45 // memcpy(app1Buffer, utils->GetApp1Buffer(), app1Length); 46 class ExifUtils { 47 48 public: 49 virtual ~ExifUtils(); 50 51 static ExifUtils* create(); 52 53 // Initialize() can be called multiple times. The setting of Exif tags will be 54 // cleared. 55 virtual bool initialize() = 0; 56 57 // Set all known fields from a metadata structure 58 virtual bool setFromMetadata(const CameraMetadata& metadata, 59 const size_t imageWidth, 60 const size_t imageHeight) = 0; 61 62 // Sets the len aperture. 63 // Returns false if memory allocation fails. 64 virtual bool setAperture(uint32_t numerator, uint32_t denominator) = 0; 65 66 // Sets the value of brightness. 67 // Returns false if memory allocation fails. 68 virtual bool setBrightness(int32_t numerator, int32_t denominator) = 0; 69 70 // Sets the color space. 71 // Returns false if memory allocation fails. 72 virtual bool setColorSpace(uint16_t color_space) = 0; 73 74 // Sets the information to compressed data. 75 // Returns false if memory allocation fails. 76 virtual bool setComponentsConfiguration(const std::string& components_configuration) = 0; 77 78 // Sets the compression scheme used for the image data. 79 // Returns false if memory allocation fails. 80 virtual bool setCompression(uint16_t compression) = 0; 81 82 // Sets image contrast. 83 // Returns false if memory allocation fails. 84 virtual bool setContrast(uint16_t contrast) = 0; 85 86 // Sets the date and time of image last modified. It takes local time. The 87 // name of the tag is DateTime in IFD0. 88 // Returns false if memory allocation fails. 89 virtual bool setDateTime(const struct tm& t) = 0; 90 91 // Sets the image description. 92 // Returns false if memory allocation fails. 93 virtual bool setDescription(const std::string& description) = 0; 94 95 // Sets the digital zoom ratio. If the numerator is 0, it means digital zoom 96 // was not used. 97 // Returns false if memory allocation fails. 98 virtual bool setDigitalZoomRatio(uint32_t numerator, uint32_t denominator) = 0; 99 100 // Sets the exposure bias. 101 // Returns false if memory allocation fails. 102 virtual bool setExposureBias(int32_t numerator, int32_t denominator) = 0; 103 104 // Sets the exposure mode set when the image was shot. 105 // Returns false if memory allocation fails. 106 virtual bool setExposureMode(uint16_t exposure_mode) = 0; 107 108 // Sets the program used by the camera to set exposure when the picture is 109 // taken. 110 // Returns false if memory allocation fails. 111 virtual bool setExposureProgram(uint16_t exposure_program) = 0; 112 113 // Sets the exposure time, given in seconds. 114 // Returns false if memory allocation fails. 115 virtual bool setExposureTime(uint32_t numerator, uint32_t denominator) = 0; 116 117 // Sets the status of flash. 118 // Returns false if memory allocation fails. 119 virtual bool setFlash(uint16_t flash) = 0; 120 121 // Sets the F number. 122 // Returns false if memory allocation fails. 123 virtual bool setFNumber(uint32_t numerator, uint32_t denominator) = 0; 124 125 // Sets the focal length of lens used to take the image in millimeters. 126 // Returns false if memory allocation fails. 127 virtual bool setFocalLength(uint32_t numerator, uint32_t denominator) = 0; 128 129 // Sets the degree of overall image gain adjustment. 130 // Returns false if memory allocation fails. 131 virtual bool setGainControl(uint16_t gain_control) = 0; 132 133 // Sets the altitude in meters. 134 // Returns false if memory allocation fails. 135 virtual bool setGpsAltitude(double altitude) = 0; 136 137 // Sets the latitude with degrees minutes seconds format. 138 // Returns false if memory allocation fails. 139 virtual bool setGpsLatitude(double latitude) = 0; 140 141 // Sets the longitude with degrees minutes seconds format. 142 // Returns false if memory allocation fails. 143 virtual bool setGpsLongitude(double longitude) = 0; 144 145 // Sets GPS processing method. 146 // Returns false if memory allocation fails. 147 virtual bool setGpsProcessingMethod(const std::string& method) = 0; 148 149 // Sets GPS date stamp and time stamp (atomic clock). It takes UTC time. 150 // Returns false if memory allocation fails. 151 virtual bool setGpsTimestamp(const struct tm& t) = 0; 152 153 // Sets the height (number of rows) of main image. 154 // Returns false if memory allocation fails. 155 virtual bool setImageHeight(uint32_t length) = 0; 156 157 // Sets the width (number of columns) of main image. 158 // Returns false if memory allocation fails. 159 virtual bool setImageWidth(uint32_t width) = 0; 160 161 // Sets the ISO speed. 162 // Returns false if memory allocation fails. 163 virtual bool setIsoSpeedRating(uint16_t iso_speed_ratings) = 0; 164 165 // Sets the kind of light source. 166 // Returns false if memory allocation fails. 167 virtual bool setLightSource(uint16_t light_source) = 0; 168 169 // Sets the smallest F number of the lens. 170 // Returns false if memory allocation fails. 171 virtual bool setMaxAperture(uint32_t numerator, uint32_t denominator) = 0; 172 173 // Sets the metering mode. 174 // Returns false if memory allocation fails. 175 virtual bool setMeteringMode(uint16_t metering_mode) = 0; 176 177 // Sets image orientation. 178 // Returns false if memory allocation fails. 179 virtual bool setOrientation(uint16_t orientation) = 0; 180 181 // Sets the unit for measuring XResolution and YResolution. 182 // Returns false if memory allocation fails. 183 virtual bool setResolutionUnit(uint16_t resolution_unit) = 0; 184 185 // Sets image saturation. 186 // Returns false if memory allocation fails. 187 virtual bool setSaturation(uint16_t saturation) = 0; 188 189 // Sets the type of scene that was shot. 190 // Returns false if memory allocation fails. 191 virtual bool setSceneCaptureType(uint16_t type) = 0; 192 193 // Sets image sharpness. 194 // Returns false if memory allocation fails. 195 virtual bool setSharpness(uint16_t sharpness) = 0; 196 197 // Sets the shutter speed. 198 // Returns false if memory allocation fails. 199 virtual bool setShutterSpeed(int32_t numerator, int32_t denominator) = 0; 200 201 // Sets the distance to the subject, given in meters. 202 // Returns false if memory allocation fails. 203 virtual bool setSubjectDistance(uint32_t numerator, uint32_t denominator) = 0; 204 205 // Sets the fractions of seconds for the <DateTime> tag. 206 // Returns false if memory allocation fails. 207 virtual bool setSubsecTime(const std::string& subsec_time) = 0; 208 209 // Sets the white balance mode set when the image was shot. 210 // Returns false if memory allocation fails. 211 virtual bool setWhiteBalance(uint16_t white_balance) = 0; 212 213 // Sets the number of pixels per resolution unit in the image width. 214 // Returns false if memory allocation fails. 215 virtual bool setXResolution(uint32_t numerator, uint32_t denominator) = 0; 216 217 // Sets the position of chrominance components in relation to the luminance 218 // component. 219 // Returns false if memory allocation fails. 220 virtual bool setYCbCrPositioning(uint16_t ycbcr_positioning) = 0; 221 222 // Sets the number of pixels per resolution unit in the image length. 223 // Returns false if memory allocation fails. 224 virtual bool setYResolution(uint32_t numerator, uint32_t denominator) = 0; 225 226 // Sets the manufacturer of camera. 227 // Returns false if memory allocation fails. 228 virtual bool setMake(const std::string& make) = 0; 229 230 // Sets the model number of camera. 231 // Returns false if memory allocation fails. 232 virtual bool setModel(const std::string& model) = 0; 233 234 // Generates APP1 segment. 235 // Returns false if generating APP1 segment fails. 236 virtual bool generateApp1(const void* thumbnail_buffer, uint32_t size) = 0; 237 238 // Gets buffer of APP1 segment. This method must be called only after calling 239 // GenerateAPP1(). 240 virtual const uint8_t* getApp1Buffer() = 0; 241 242 // Gets length of APP1 segment. This method must be called only after calling 243 // GenerateAPP1(). 244 virtual unsigned int getApp1Length() = 0; 245 }; 246 247 248 } // namespace helper 249 } // namespace V1_0 250 } // namespace common 251 } // namespace camera 252 } // namespace hardware 253 } // namespace android 254 255 256 #endif // ANDROID_HARDWARE_INTERFACES_CAMERA_COMMON_1_0_EXIF_H 257
